Shuttle block



A ril 20, 192 6. 1,581,157

' W. A. BASHAW SHUTTLE BLOCK Filed Oct 25, 1924 Patented-Apr. 20, 14 323 i i I f i i 7 STATES PATENT OFFICE wmrm .a. BAsiI Aw, or WILKINONVILLE, massacnusm'rs. I

SHUTTLE 31.00;.

Application filed-October '25, 1924- Serial No. 745,904.

To all whom it may concern: The axis of the thread passa e 12 is sub Be it known that I, WILLIAM A.'BASHAW, stantiallly aligned'with the b bin or weft a citizen of the United States, residing at carrier The shuttle is provided with the Wilkinsonville in the county of Worcester usual opening or outlet 14 at the sidefrom 60 5. and State of Massachusetts, have invented' a which the weft W extends to the fabric. My

new and useful Shuttle Block, of which the invention consists primarily in providing following is a specification. means for preventing rearward unthreadi ng This invention relates 'to a self-threading movement of the weft W through the thread shuttle block particularly designed for use passage 12. V 65 in automatic weft replenishing looms. It is In the preferred from of my invention I essential that such shuttle blocks should be accomplish this purpose by inserting an invery. easily threaded by simply drawing the ner-sleeve 15' in the thread passage 12, the

thread over the. shuttle block. It is also es- .sleeve being preferably a drive fit in the sential that such shuttle blocks shall remain thread passage and being held byfriction 70 p 15 threaded "under all conditions of operation. therein. The sleeve 15 is'provided with a It sometimes happens that a loop will be longitudinal slot or opening 16 which is a formed in the weft or filling as it is drawn preferably positioned atone side and below from the bobbin and such a loop frequently the center line of the sleeve when the latter causes unthreading of the shuttle block. is in operative position, as indicated in 75 20 It is the. object of my invention to im- Fig. 12. v V

prove the construction of such shuttle blocks In its upper part, a portion of the sleeve to the end that accidental unthieading there- 12 is cut away so that 1ts outer convex sp rof may be substantially eliminated. 1 face is of less radius thjan'the sleeve 15. A In the preferredform'of my invention I notch or recess 18 is also formed at the front 80 have provided an inner sleeve in the thread end of the; sleeve 15 and the rear corner of passage, having a forwardly projecting por-' the portionv 17 is cut away or bevelled as intion. adapted to engage the thread and predicated at 20.

vent unthreadingof the shuttle block. When the sleeve 15 is in position in the i k The preferred form thefinvention is thread passage 12 of the shuttle block 11, 85 shown in the drawings In which the weft thread may be readily inserted Fig. 1 is a partial plan view of a shuttle therein, the thread passing down through having my improved shuttle block mounted the slot or opening 13 and then sliding downtherein; I ward and sideways over the projecting por- Fig. 2 is a transverse sectional end elevation 17 of the sleeve until it enters the slot 90 tion, taken alongthe line 2- -2 in Fig. 1; i 16 thereof, through which it passes to the r Fig. 3 is a side elevation, partly in section, central thread passage of the sleeve. The i of my improved shuttlelock; sleeve 15 thus forms no obstruction to the.

Fig. is a sideelevation of the .inner easy threading of the shuttleblock. sleeve for the thread passage; If the thread loops backward, it must 95 40 Fig. 5' 's an end view thereof, looking in 1 move backward along-the slot or opening 13 the direction of the arrow 5 in Fig. 4:, and and while thus positioned it is guided mto Fig. 6 is a perspective view thereof. the notch or recess 18 of the sleeve 15 and Referring to the drawin s, I have shown is thus effectively prevented from throwing a 'portionof a shuttle 1D in which my imout of the slot 16. The bevelled rear cornerT 100 proved shuttle block 11 t is inserted and se- 20 of the projection 17 permits easier threadcured in any usual manner. In itsgeneral in ofthe shuttle block. features the shuttleblock may be greatly Vhile I have shown my invention; as em varied ifi construction and the particular bodied in a shuttle block of the particular shuttle block shown in the drawings is illustype, it will be understood that my invention .trative -on ly, except as to features hereinmaybe used with any shuttleblock having a I ja'fter particularly pointed out. thread passage with an upper slot or open- The shuttle block 11 base thread passage -ing 13 or any similar or equivalent construc-' 12 of substantlallyclrcular outline andprotion. T v'ided witlr'Tiij-long tudinal slot or opening 13 While the sleeve 15 forms a very small iniits upper portion for the entrance of the and inconspicpous addition to a shuttle thread fiv hen. the shuttle is being threaded. block, it has-been found tovery greatly rep duce the occurrence of mis-threading or unthreading during the operation of the shuttle. I

.The sleeve may also be formed integral with the shuttle block by a process of diecasting' or otherwise, as will be evident to those skilled in the art.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what do claim is 1'. In a loom, in combination, a shuttle having a shuttle block with a thread passage having a longitudinally extended thread admitting opening therein and a sleeve in said passage through which said thread extends freely axially from .end to end thereof y when inrunning position, said sleeve having a slot offset angularly from said thread opening and said sleeve having a reentrant recess at the forward end thereof adjacent the longitudinal opening in said thread passage. and said sleeve having a forwardly projecting loop-catching portion between said recess and said slot.

2. In a loom, in combination, a shuttle having a shuttle block with a thread passage having a longitudinally extended thread admitting opening at one side thereof and a sleeve in said passage slotted longitudinally and having a portion reduced in outside diameter to admit a thread from said entrance opening, said sleeve being positioned with its slot substantially out of alignment withv said entrance opening and said sleeve having a reentrant recess at the front end thereof adjacent said entrance opening but.

separated from said slot, said recess being efiective to receive and hold a backward looping thread and to thereby prevent unthreading of said shuttle block.

In testimony whereof I have hereunto aflixed my signature.

WILLIAM A. BASHAW. 

